First Creation

src/ThreadedCompare.java

@@ -0,0 +1,79 @@
+import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.List;
+public class ThreadedCompare extends Thread {
+    private final List<Path> pathsToCompareTo;
+    private final List<Path> pathsToBeCompared;
+    public ThreadedCompare (List<Path> pathsToBeCompared, List<Path> pathsToCompareTo) {
+        this.pathsToBeCompared = pathsToBeCompared;
+        this.pathsToCompareTo = pathsToCompareTo;
+    }
+    @Override
+    public void run() {
+
+        //Compare every File
+        for (Path file1 : pathsToBeCompared) {
+            for (Path file2 : pathsToCompareTo) {
+                try {
+                    if (sameContent(file1, file2)) {
+                        List<Path> bothPaths = new ArrayList<>();
+                        bothPaths.add(file1);
+                        bothPaths.add(file2);
+
+                        //here it is trying to add the values in the HashMap
+                        if (Main.fileMap.containsKey(getMD5Sum(file1.toFile()))) {
+                            if (!Main.fileMap.get(getMD5Sum(file1.toFile())).contains(file1)) {
+                                Main.fileMap.get(getMD5Sum(file1.toFile())).add(file1);
+                            }
+                            if (!Main.fileMap.get(getMD5Sum(file1.toFile())).contains(file2)) {
+                                Main.fileMap.get(getMD5Sum(file1.toFile())).add(file2);
+                            }
+                        } else {
+                            Main.fileMap.put(getMD5Sum(file1.toFile()), bothPaths);
+                        }
+                    }
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            //Update the Progress that can be found in The Main Class
+            Main.progress += 1;
+        }
+        //Update the thread Completion Counter that can be found in the Main Class
+        Main.completedThreads += 1;
+    }
+    private boolean sameContent(Path file1, Path file2) throws IOException {
+        if (file1 != file2) {
+            return Files.mismatch(file1, file2) == -1;
+        }
+        return false;
+    }
+
+    //this is used to get the MD5 String of one of the files (one of them is just fine since they both have the same value)
+    private String getMD5Sum (File file) throws IOException {
+        MessageDigest messageDigest = null;
+        try {
+            messageDigest = MessageDigest.getInstance("MD5");
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException(e);
+        }
+        FileInputStream fis = new FileInputStream(file);
+
+        byte[] dataBytes = new byte[1024];
+
+        int unread = 0;
+        while ((unread = fis.read(dataBytes)) != -1) {
+            messageDigest.update(dataBytes, 0, unread);
+        }
+        byte[] mdbytes = messageDigest.digest();
+        StringBuilder sb = new StringBuilder();
+        for (byte mdbyte : mdbytes) {
+            sb.append(Integer.toString((mdbyte & 0xff) + 0x100, 16).substring(1));
+        }
+        return sb.toString();
+    }
+}